XMLHttpRequest cannot load http://localhost: /geoserver/wfs. Origin http://localhost is not allowed by Access-Control-Allow-Origin

Possible Duplicate:
Setup own Openlayers Proxyhost
Error WFS Request, PROXY problems

I have this error:

XMLHttpRequest cannot load http:// localhost: /geoserver/wfs
Origin http:// localhost is not allowed by Access-Control-Allow-Origin 

in my google chrome console when i make a WFS request. I use apache tomcat 6 and geoserver which run on 8081 and 8080 port. I read that this error is related to proxy.

How must to resolve my problem? I run my application on Windows 7 machine.